Validate React Forms with Formik and Yup

DevanB · Mar 27, 2019 · 2efd354 · 2efd354
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diff --git a/validate-react-forms-with-formik-and-yup/.gitignore b/validate-react-forms-with-formik-and-yup/.gitignore
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+node_modules
diff --git a/validate-react-forms-with-formik-and-yup/README.md b/validate-react-forms-with-formik-and-yup/README.md
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+# Validate React Forms with Formik and Yup
+
+[Watch the lesson](https://egghead.io/lessons/react-simplify-and-convert-a-traditional-react-form-to-formik)
+
+# Running
+
+1. Install dependencies
+
+```sh
+yarn
+```
+
+2. Run the develop script
+
+```sh
+yarn start
+```
diff --git a/validate-react-forms-with-formik-and-yup/package.json b/validate-react-forms-with-formik-and-yup/package.json
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+{
+  "name": "validate-react-forms-with-formik-and-yup",
+  "version": "1.0.0",
+  "description": "An example form with validations built with Formik, Yup, and React",
+  "license": "MIT",
+  "keywords": [
+    "formik",
+    "yup",
+    "react"
+  ],
+  "homepage": "https://codesandbox.io/s/",
+  "main": "index.js",
+  "dependencies": {
+    "formik": "1.5.1",
+    "react": "16.8.5",
+    "react-dom": "16.8.5",
+    "yup": "0.27.0"
+  },
+  "devDependencies": {
+    "react-scripts": "2.1.8"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test --env=jsdom",
+    "eject": "react-scripts eject"
+  },
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ]
+}
diff --git a/validate-react-forms-with-formik-and-yup/public/favicon.ico b/validate-react-forms-with-formik-and-yup/public/favicon.ico
diff --git a/validate-react-forms-with-formik-and-yup/public/index.html b/validate-react-forms-with-formik-and-yup/public/index.html
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+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
+  <meta name="theme-color" content="#000000">
+  <!--
+    manifest.json provides metadata used when your web app is added to the
+    homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
+  -->
+  <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
+  <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+  <!--
+    Notice the use of %PUBLIC_URL% in the tags above.
+    It will be replaced with the URL of the `public` folder during the build.
+    Only files inside the `public` folder can be referenced from the HTML.
+
+    Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+    work correctly both with client-side routing and a non-root public URL.
+    Learn how to configure a non-root public URL by running `npm run build`.
+  -->
+  <title>React App</title>
+
+</head>
+<body>
+  <div id="root"></div>
+  <!--
+    This HTML file is a template.
+    If you open it directly in the browser, you will see an empty page.
+
+    You can add webfonts, meta tags, or analytics to this file.
+    The build step will place the bundled scripts into the <body> tag.
+
+    To begin the development, run `npm start` or `yarn start`.
+    To create a production bundle, use `npm run build` or `yarn build`.
+  -->
+</body>
+</html>
diff --git a/validate-react-forms-with-formik-and-yup/public/manifest.json b/validate-react-forms-with-formik-and-yup/public/manifest.json
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+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "192x192",
+      "type": "image/png"
+    }
+  ],
+  "start_url": "./index.html",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/validate-react-forms-with-formik-and-yup/src/ItemList.js b/validate-react-forms-with-formik-and-yup/src/ItemList.js
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+import React from "react";
+
+const ItemList = ({ items }) => (
+  <ul>
+    {items.map(item => (
+      <li key={item}>{item}</li>
+    ))}
+  </ul>
+);
+
+export default ItemList;
diff --git a/validate-react-forms-with-formik-and-yup/src/index.css b/validate-react-forms-with-formik-and-yup/src/index.css
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+body {
+  -moz-osx-font-smoothing: grayscale;
+  -webkit-font-smoothing: antialiased;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
+    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
+    sans-serif;
+  margin: 0 auto;
+  max-width: 25em;
+  padding: 0 2em;
+}
+button,
+input[type="submit"] {
+  background: white;
+  border-radius: 0.25em;
+  border: 1px solid black;
+  cursor: pointer;
+  display: inline-block;
+  font-size: 1em;
+  margin-top: 2em;
+  padding: 0.5em 1em;
+  transition: all 250ms ease;
+}
+button:hover,
+button:focus,
+input[type="submit"]:hover,
+input[type="submit"]:focus {
+  background: hsl(0, 0%, 90%);
+}
+form {
+  margin-top: 2em;
+  width: 100%;
+}
+form * {
+  display: block;
+}
+input[type="text"] {
+  font-size: 1em;
+  margin-bottom: 1em;
+  padding: 1em 0.5em;
+}
+label {
+  margin-bottom: 0.25em;
+}
+ul {
+  background: hsl(0, 0%, 90%);
+  padding: 1em 1em 1em 2em;
+}
diff --git a/validate-react-forms-with-formik-and-yup/src/index.js b/validate-react-forms-with-formik-and-yup/src/index.js
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+import { ErrorMessage, Field, Form, Formik } from 'formik';
+import React from 'react';
+import { render } from 'react-dom';
+import './index.css';
+import ItemList from './ItemList';
+import * as Yup from 'yup';
+
+const initialValues = {
+  item: '',
+};
+
+const validationSchema = Yup.object().shape({
+  item: Yup.string().required('Item name is required'),
+});
+
+const App = () => {
+  const [items, setItems] = React.useState([]);
+
+  return (
+    <React.Fragment>
+      <h2>Regular Maintenance:</h2>
+      <ItemList items={items} />
+      <Formik
+        initialValues={initialValues}
+        validationSchema={validationSchema}
+        onSubmit={values => {
+          setItems([...items, values.item]);
+        }}
+      >
+        <Form>
+          <label htmlFor="item">Item:</label>
+          <Field type="text" name="item" />
+          <ErrorMessage name="item" />
+          <button type="submit">Add Item</button>
+        </Form>
+      </Formik>
+    </React.Fragment>
+  );
+};
+
+export default App;
+
+render(<App />, document.getElementById('root'));
diff --git a/validate-react-forms-with-formik-and-yup/src/index.old.js b/validate-react-forms-with-formik-and-yup/src/index.old.js
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+import { Field, Form, Formik } from "formik";
+import React from "react";
+import { render } from "react-dom";
+import "./index.css";
+import ItemList from "./ItemList";
+
+const App = () => {
+  const [items, setItems] = React.useState([]);
+
+  return (
+    <React.Fragment>
+      <h2>Regular Maintenance:</h2>
+      <ItemList items={items} />
+      <Formik
+        onSubmit={values => {
+          setItems([...items, values.item]);
+        }}
+      >
+        <Form>
+          <label htmlFor="item">Item:</label>
+          <Field type="text" name="item" />
+          <button type="submit">Add Item</button>
+        </Form>
+      </Formik>
+    </React.Fragment>
+  );
+};
+
+export default App;
+
+render(<App />, document.getElementById("root"));